# What is the correct order to use factorization matrices in multiplication?

**URL:** <https://discourse.julialang.org/t/what-is-the-correct-order-to-use-factorization-matrices-in-multiplication/85194>\
**Category:** General Usage\
**Tags:** question\
**Created:** [August 2, 2022, 8:41pm UTC](https://discourse.julialang.org/t/what-is-the-correct-order-to-use-factorization-matrices-in-multiplication/85194 "2022-08-02T20:41:31Z")\
**Posts on this page:** 1\
**Showing post:** 21

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**Author:** ![Palli](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/palli/32/3380_2.png) [@Palli](https://discourse.julialang.org/u/Palli)\
**Post date:** [September 27, 2022, 2:06pm UTC](https://discourse.julialang.org/t/what-is-the-correct-order-to-use-factorization-matrices-in-multiplication/85194/21 "2022-09-27T14:06:44Z")

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It’s good, but is it the best (feel free to send me a private message, if not helpful here)? I saw a new format, and Julia package for recently, and while I didn’t mean to interject, I thought it might be relevant to the user here; see on other question where I also posted:

> [@Block Sparse Matrix](https://discourse.julialang.org/t/block-sparse-matrix/81465/2):
>
> It took me a while to find this, I recalled the first package that I put at the top of the list (maybe none applies to you, but posting just in case, what I found while searching): [https://discourse.julialang.org/t/ann-fast-spmv-with-compressedsparseblocks-jl/84680](https://discourse.julialang.org/t/ann-fast-spmv-with-compressedsparseblocks-jl/84680)[https://discourse.julialang.org/t/ann-announcing-threadedsparsecsr-jl/71343](https://discourse.julialang.org/t/ann-announcing-threadedsparsecsr-jl/71343)[https://discourse.julialang.org/t/ann-announcing-threadedsparsecsr-jl/71343](https://discourse.julialang.org/t/ann-announcing-threadedsparsecsr-jl/71343)[https://discourse.julialang.org/t/best-way-to-use-cusparsematrixbsr/86075](https://discourse.julialang.org/t/best-way-to-use-cusparsematrixbsr/86075)

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